I am now dating this super confident socialite girl (don't worry, this is a general question). Anyways, she often casually insults/teases me in regular conversation. Example: Her: "hold my purse, I have to go to the bathroom" Me: "sure" [I take purse] Her (to a friend): "APersian is my bitch now haha" [turns and winks at me before leaving]

I have never encountered girls who are this confident and who do stuff like this. How should I have responded? What is the best way to deal with confident, jokingly bitchy attractive girls?